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Thermostat How To Guide
Programming & Troubleshooting

Got a new thermostat and need help programming it? We can help!

How to program a Trane Nexia 850 thermostat preview image

How to program a Trane Nexia 850 thermostat

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How to program a Honeywell T4 thermostat preview image

How to program a Honeywell T4 thermostat

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How to program a Honeywell T6 thermostat preview image

How to program a Honeywell T6 thermostat

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How to program a Nest thermostat preview image

How to program a Nest thermostat

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DIY Thermostat fixes

Try these easy fixes

  • Check the thermostat batteries. If your thermostat batteries are dead, your unit won't run.

If you tried these fixes and your thermostat still isn't working right, it's time to call a professional.

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Featured Review of Reliable Heating & Air on Google

We are proud of 4.8/5 stars and over 20k Google reviews.

Our technician Rodney who also had helped us with plumbing issues at a previous property was prompt courteous, and a joy to work with. All the folks from reliable have made a lasting positive impression on us, and so we have been and will continue to be long term repeat customers. While I may ask for other estimates for work to do my due diligence, I value my prior experience with Reliable beyond what their estimates are. They have very knowledgeable people who rapidly diagnose and solve problems with what feels like our best interests in mind.

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